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A; 0. BATES. AUTOMATIC ROSE ENGINE.

No. 433,846. Patented Aug. 5, 1890.

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A. O. BATES.

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A. 0. BATES. AUTOMATIC ROSE ENGINE. No. 438,846. Patented Aug..5, 1890.

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ALFRED BATES, OF SAG HARBOR, NET/V YORK, 'ASSIGNOR TO THE FAHYS IVATCH CASE COMPANY, OF SAME PLACE.

AUTOMATIC ROSE-ENGINE.

SPECIFICATION forming part of Letters Patent No. 433,846, dated August 5, 1890.

Application filed April 25, 1889. Serial No. 308,535. (No model.)

To all whom it may concern:

Be it known that I, ALFRED C. BATES, a subject of the Queen of the United Kingdom of Great Britain and Ireland, residing at Sag Harbor, county of Suffolk, State of New York,

have invented certain new and useful Im-:

provements in Automatic Rose-Engines, of which the following is a specification.

This improvement relates to that class ofcase back to be engine-turned. This enlargement of the pattern-block or form, however, was of advantage only in so far as the circumference of the pattern was concerned. N0 means were provided to allow the roller to traverse the pattern-block a distance proportionate to the travel circumferentially; hence the pattern or the form of patternblock was not in true proportion. For example, if it was designed to produce a square or block-shaped figure on the edge of the case the pattern-block figure would appear as an oblong. The same difficulty of course was to be contended with in the reproduction of leaves, flowers, &c. Thus it will be seen that the rose, for instance, on the pattern-block would be precisely the same width as the one reproduced on the watch-case back, but many times longer. My invention is intended to overcome this difficulty, and it will be fully described with reference to the accompanying drawings,the novel features being pointed out in the claims In said drawings, Figure 1 represents a side elevation of the ordinary Field lathe. Fig. 2 is a similar yiew of my improved machine. Fig. 3 is a plan view of the latter. Figs. 4 and 5 are face views of the pattern-block of form preferably employed by me and showing diversified patterns.

In all the figures 1 is a lathe shaft or spindle; 2, a pattern shaft or spindle; 3 4, gearing connecting the two; 5, a watch-case lid or back in position to be turnedthat is to say, secured crownwise in the end of the spindle;

In these ma 6, the pattern-block formed or secured crownwise upon the disk or end of said shaft 2; 7, any suitable lathe-frame; 8, the engravingtool and stock; 9, segment on which itvis mounted; 10, pivot or axis of vibration for .said segment carried by the frame, said axis being parallel and radial toth'eplane of r0- tation of said watch-case; 11, the tracingroller, and 12 its supporting-arm rigid as to lateral motion on segment 9, but capable of Go being vibrated about an axis 12 on said segment 9, said axis being parallel and tangential to the plane of rotation of said watchcase.

It will be seen'that the segment 9, carrying the tool 8 and the roller 11, is swung on the pivot 10. As the point of the tool 8 and the bearing-surface of the roller 11 on pattern 6 are in the same vertical line in the form of lathe shown in Fig. 1, it must follow that the arc of the circle described about pivot 10 by the roller 11 must be precisely the same as that described by the point or cutter 8. They therefore traverse the same distance during the operation of the engine turninga watch-case back. Thus, although the pattern 6 may, as shown in Fig. l,be made many times the size of the watch-case back to be turned, and thus the circumferentiallines of the pattern may be made much larger than a reproduced design on the watch-case back, the radial or horizontal lines on the patternblock and watch-case back are necessarily of equal length however large the pattern 6 may be made. This arises, as will be seen, from the fact that the pattern and watch-case lid revolve in parallel planes vertical to said shaft and spindle. To overcome the difficulty and secure to the pattern-roller a greater length of travel radially over thepattern-block, I lengthen the spindle 2, as shown in Fig. 2, thus allowing the form or pattern-block to be thrown forward or in advance of the cutter 8. The arm 12 is bent, as shown in Fig. 2, to accommodate itself to this change. It will be evident that the roller 11 will in this construction while the machine is in operation traverse a greater radial distance over the pattern-block than the cutter 8 does over the back,because the cutter describes a small and the roller a I00 large arc of concentric circles about the pivot 10. Collars 13 keep the spindle 2 and the pattern-block carried thereby in place when the proper adjustment is 'secured. If it is desired to have the roller 11 travel a less distance than that shown, the said collars are loosened and the form and spindle slid in toward the watch-case back. By this means any degree of travel of the roller in relation to the form may be obtained.

I preferably make the diameter of the gear 3 a multiple of that of the gear 4-say, in proportion of 4 to 1. By this means the pattern is rotated with greater rapidity than the watch-case back, so that a larger pattern may be made to pass under the roller 11 than is reproduced by the cutter on the watch-case back. I thus obtain with a small patternblock rotated at great speed the same result that is obtained by the form of machine shown'in Fig. 1 by the large pattern-block rotated at the same speed as the watch-case back, the roller 11 being in either case made to travel over more space-that-is, a larger pattern-than the cutter.

I preferably make the form of pattern-block in two or more sections, as shown in Figs. 4 and 5, each section having on its face a different design. In each figure I have shown four sections. By this means an unlimited number of designs may be produced from a few pattern-blocks, as the pattern-blocks are all made uniform in size, and therefore the parts on one readily interchange with the other. Each part of the pattern block is therefore a design in itself, and the combination of three or more pattern-blocks makes a great variety of work and a result heretofore never obtained. I

Figs. 4 and 5 show two forms, each composed of four separate pieces A B O D E F G H. These forms are made uniform in size and shape; but each part may have any design upon its face. It will be seen that each form is in itself capable of being changed a number of tlmes by transposing the various parts and bringing each into a different relation with the other.

After these changes have been made, one piece of Fig. 4 may be introduced into Fig. 5 and the piece of Fig. 5 introduced into Fig. 4. They are then capable of many more changes. Then two parts of Fig. 5 may be introduced into Fig. 4 and the corresponding parts of Fig. 4 may be placed in Fig. 5,and so on ad infinitu'm. The larger the number of forms the greater the variety of changes.

Having thus described my invention, the following is what I claim as new therein and desire to secure by Letters Patent:

1. In a rose-engine, in combination with the revolving watch-case holder or lathe-shaft 1 and revolving pattern 6 at a different plane elongated spindle 2, the collars 13, and multiplying-wheel connection between the latheshaft and the spindle, substantially as described.

4. In a rose-engine having its pattern-face may be employed.

ALFRED O. BATES. Witnesses:

CORNELIUS R. SLEIGHT, THos. F. BISGOOD. 

